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Explain what is observed when: (i) KCl, an electrolyte, is added to an hydrated ferric hydroxide sol.(ii) An electric current is passed through a colloidal solution. (iii) A beam of light is passed through a colloidal solution. |
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Answer» Solution :(i) Ferric hydroxide `FE(OH)_(3)` is a positively charged SOL, so it GETS coagulated by the chloride ions released from KCl solution. (II) When an electric current is passed through a colloidal solution due to charge on the colloidal particles they migrate towards the oppositely charged electrode. (iii) When a beam of light is passed through a colloidal solution the PATH of light becomes visible. |
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